Hint: C'mon, guys - Sonic's sidekick (although with the ability to never die, I don't get why he wasn't the main hero)? If you still don't get it, look at the two orange things on the right - emphasis on TWO (ie- it should be in plural form).
Random: The highlights need to be more inside the lines, especially around the cowlicks at the front of his hair. I think I did alright proportion wise, except for the left glove, but you live and let learn, I guess.
That's all for now!
~ Ignorant Awareness